This Maytronics 9995550 White Bottom Lid Assembly and Support for Dolphin™ Robotic Pool Cleaners is a reliable replacement part, designed to seamlessly intergrate with the original pool cleaning system. The bottom lid assembly protects and cotains internal operations of the pool cleaner. Maytronics pool cleaners help keep your pool healthy and clean, which is of the utmost importance. Ensure that your pool cleaner is running as cleanly as possible with this certified genuine part.